Yamada America K25-MS-1 Diaphragm End Repair Kit

Description:

The Yamada K25-MS-1 is a liquid end repair kit used in air-operated double diaphragm (AODD) pump systems to restore diaphragm, valve, and sealing components for proper fluid handling operation. It is commonly used in Yamada NDP-25 series pumps where wear components such as diaphragms, balls, and O-rings require periodic replacement to maintain performance. Maintenance teams, OEMs, and integrators purchase this kit for preventative maintenance, pump rebuilds, and minimizing downtime in continuous-duty fluid transfer systems.

Applications:

The Yamada K25-MS-1 repair kit is used in industrial fluid handling environments where AODD pumps operate under continuous or high-cycle conditions. It is commonly deployed in chemical processing, wastewater treatment, coatings, and fluid transfer systems where maintaining diaphragm integrity and proper sealing ensures consistent flow, prevents leaks, and extends pump service life.

Technical Specifications:

• Manufacturer: Yamada Corporation
• Part Number: K25-MS-1
• Product Type: Liquid end repair kit / diaphragm pump rebuild kit
• Function: Replaces diaphragms, valve balls, and sealing components
• Application: AODD diaphragm pumps (NDP-25 series: BAS, BFS, BSS, PP variants)
• Kit Contents:
• (2) 771974 diaphragms (25TPO)
• (4) 773171 valve balls (25TPO)
• (4) 683997 O-rings
• (2) 683996 O-rings
• (2) 640154 O-rings
• Total Pieces: ~14 components per kit
• Material: TPO diaphragms, PTFE/elastomer seals (application dependent)
• Installation: Liquid end section of diaphragm pump
• Compatibility: Yamada NDP-25 AODD pump models
• Usage: Preventative maintenance and pump rebuild
• Duty Cycle: Wear component kit (periodic replacement required)
• Status: Active OEM repair kit

Common Replacements:

• Yamada K20-MS-1 (NDP-20 series)
• Yamada K25-MS-T1-1 (Teflon configuration kit)
• Yamada K50-MS (larger pump series kit)